Here is an unofficial user repository of ponsfoot for Arch Linux
https://aur.archlinux.org/packages.php?K=ponsfoot&SeB=m

If you use this repository, add the following into your /etc/pacman.conf
---
[pnsft-pur]
SigLevel = Optional TrustAll
Server = http://downloads.sourceforge.net/project/pnsft-aur/pur/$arch
---